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//
// weak_ptr_timing_test.cpp
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
// Copyright 2005 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <boost/config.hpp>
#include <vector>
#include <cstdio>
#include <ctime>
#include <cstdlib>
//
int const n = 29000;
int const k = 2048;
void test( std::vector< boost::shared_ptr<int> > & v )
{
using namespace std; // printf, rand
std::vector< boost::weak_ptr<int> > w( v.begin(), v.end() );
int s = 0, r = 0;
for( int i = 0; i < n; ++i )
{
// randomly kill a pointer
v[ rand() % k ].reset();
for( int j = 0; j < k; ++j )
{
if( boost::shared_ptr<int> px = w[ j ].lock() )
{
++s;
}
else
{
++r;
w[ j ] = v[ rand() % k ];
}
}
}
printf( "\n%d locks, %d rebinds.", s, r );
}
int main()
{
using namespace std; // printf, clock_t, clock
std::vector< boost::shared_ptr<int> > v( k );
for( int i = 0; i < k; ++i )
{
v[ i ].reset( new int( 0 ) );
}
clock_t t = clock();
test( v );
t = clock() - t;
printf( "\n\n%.3f seconds.\n", static_cast<double>( t ) / CLOCKS_PER_SEC );
return 0;
}
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